Patent US2514221A successfully refreshed from Google Patents.
US2514221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of rubbery copolymers with stannous phenylcatecholates
Assignee: Bridgestone Firestone Inc
•
Filing: 1949-11-02
•
Granted: 1950-07-04
•
Expires: 1969-11-02
Abstract
No abstract record available.
Inventors
- 👤 Harry E Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:39
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/138
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
RUBBERY COPOLYMER OF A CONJUGATED-DIENE MONOMER AND A VINYL MONOMER STABILIZED WITH A SMALL AMOUNT OF STANNOUS P-PHENYLCATECHOLATE.
Claim 2
Dependent Claim
18 words
RUBBERY COPOLYMER OF A CONJUGATED-DIENE MONOMER AND A VINYL MONOMER STABILIZED WITH A SMALL AMOUNT OF STANNOUS P-PHENYLCATECHOLATE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-03 | 1954-01-02 | 1954-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-03 | 1958-01-02 | 1958-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-03 | 1962-01-02 | 1962-07-04 | $7700.00 | Window Closed / Lapsed |